Question

For an A.P.,tn=7n-12 and d=7. Find a.

Answer 1

Sure I will answer it for you mate,

tn = 7n-12

d = 7

tn = a+(n-1)d

7n-12 = a+(n-1)7

=7n-12 = a+ 7n-7

= a = -5

This is the answer friend please mark it as brain list please please follow too...